The thermostat works fine most of the year. The problem is only being able to select heating or cooling mode. If the temp is warm during the day but drops overnight, the mode is set for cooling and not heating so the system never clicks on at night when you need heat.
I received this thermostat free as part of a government energy program. It had been working fine for 2 years until my wifi modem was changed to a combination 2.4g/5g one. The wifi for the thermostat then stopped. Trying to get it back online proved unsuccessful and frustrating on numerous occasions. I called my internet provider and they were able to split the wifi modem into 2 separate signals. I was then able to connect it back again, but it was not easy. So you MUST have a 2.4 ghz wifi signal in order to make it operate, like its says in the literature. WILL NOT WORK WITH 5G MODEMS Happy now that it is working again. Love the geo-fence feature.
This thermostat is poorly designed. It does not read the room temp correctly and cycles itself on/off every 5 mins. The wifi function is useless because the thermostat keeps disconnecting itself from the wifi.